【Key words】 Family； Social Transition； Rural Stratification； Stratification Unit； Standard of Stratification；
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方法采用初级单位含量分层，整群，随机的抽样方法及线索调查。
Methods: Adoppting the elementary units content to divide layer, whole group. Sample method and clue investigation.
方法：采用分层抽样与整体抽样对84个医疗单位242人进行信访调查，并对资料完整的225人（92.97%）进行分析。
Method: We adopted different level and wholly type sampling and letter investigation for 242 person who works in 84 medical unit, We analyzed 225 people's data (92. 97% ) .
此固定制剂是肠溶包衣分层片剂、胶囊或多单位片剂剂型的形式。
The fixed formulation is in the form of an enteric coating layered tablet, a capsule or a multiple unit tableted dosage form.
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